...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::lockfree::spsc_queue::implementation_defined
// In header: <boost/lockfree/spsc_queue.hpp> template<typename T, typename ... Options> struct implementation_defined { // types typedef allocator_arg allocator; typedef std::size_t size_type; };